Process for the production of photographic prints and light-sensitive material



Patented Nov. 24, 1931 UNITED STATES PATENT oar-Ice KAI E62, DESSAU-ZIEBIGK IN ANHALT, GELKANY, ASSIGNOR, BY MERE A8- SIGNMEN'TS, TO AGIA. ANSCO CORPORATION, OF BINGHAMTON, NEW YORK, .5. CO3- roaa'rron or new You rnoczss Ion 'rnn-raonuc'nox or AN D LIGHT-SENSITIVE I9 Drawing. Application filed February 24, 1988, Serial lib. 356,800, and in German; larch 10, 1927.

The resent invention relates to the roduction 0 photographic prints, articu arly to the development of copies on ayers contain- 1 ing as a light-sensitive substance a salt of a lene series. a

- In my preceding application Serial Number 256,810, filed February 24, 1928, I' have dis-t -..closed a process for'the production of photo- 10 prints consisting in the development of exposed layers which contain a salt'ofa sulfonic acid of a 1.2-quinorie of the naphthalene se-' rice with the solution of an organic compound containin one or more amino-groups. Now

I found t at thedevelopment of-such'layers can advantageously be executed with analkaline, solution of anorganic compound con 'taining a so-called acid methylene-group,

- that'is to'say, compounds which contain an unsubstituted or substituted methyl-group having an easily reactingehydrogen-atom;'

From the great num aceto-amide, meth lphenylpyrazolone, hy-

droxybenzenes an color-scale.

as developers permits one to" every tone of t e substances can be incorpo t d t therwith:

4-sulfonate and resorcinol is developed after exposure under a black and white drawing with gaseous ammonia. There results derectly a dark-green positive copy. r Example 2.A paper coated with a layer 4.6-disulfonate and hydroxybenz ene is ex posed under a black'and white drawing and developed with gaseousammonia. The directly resulting green positive copy becomes sulfonic acid of a 1.2-quinone of the naphtha-v gins which consists .in exposing 1 to light r of bodies having, an acid methylene cup I mentionas exam-f ples: eth 1 ester 0 aceto-acetic acid,, cyanoresorcinol. The great; number of these substances which'maybeused ealize nearly developed after exposure by a treatment with Tnaphthalene series and develo in containing "ammonium 1.2-naphthoquino'nered-violet after having been exposed to the influence of the air during a short time.

Example 3.-A. paper coated with a layer containing sodium '1.2-naphthoquinone4i-sulfonate and hydroxybenzene is developed after exposure with gaseous ammonia. The directly resulting dark-green positive copy changes its color to'blue-violet after a short ex osure to the air.

t is not necessary that the sensitive layers according to the preceding examples contain the developing agent ,(hydroxybenzene, resorcinol). The exposed layers containin the sensitizing'compound can also be deve oped in an alkaline solution of the developing agent. t

IQlaimfi f p I -1. The process of making photographic hind afpositive a support coated with a salt of a sul onic. acid of a' 1.2 'uinone of the naphthalene series and deve oping the exposedlight-sens'itive' surface with an-organic l ehind a qsitive a support coated a ith a salt offa'sul onic acid of a 1.2- uino'ne of the naphthalene series and deve oping the exposed, light-sensitive surface with a hydroxy compound of the benzene series and an alkali. 3. The process of making photographic 'pgints whlch consists in exposing to ihght a hind a positive a su port coated with a 95 salt .ojalsulfonic acid 0' a 1.2-quinone of the the exposed light-sensitive surface wit p enol and an alkali.

4. Light-sensitive materials oom rising a support coated with a salt "ofa'sul onic acid of a 1.2-quino'ne ofthe naphthalene series and an,or anic compound containing an acid methy ene-grou 5. Light-sensitive materials comprising a support coated with a salt of asul onic acid a of a 1.2-quinone of the naphthalene series and .a hydroxy benzene.

, 6. Light-sensitive materials com rising a I support coated with a salt of a sul onic acid of al.2-quinone of the naphthalene series and phenol.

7. The process of making photographic rints which consists in exposin to light beind a positive a sup ort coate with'a salt of a sulfonic acid 0 a 1.2-quinone of the naphthalene series, and develo ing the exposed light-sensitive surface witli an or anic compound containing an acid methy eneroup already present in the light-sensitive ayer by the action of gaseous ammonia.

8. The room of making photographic I prints whlch consists in exposing to light ehind a positive a support coated with a 15 salt of a sulfonic acid 0 a 1.2-quinone of the naphthalene series, and developing thevexposed light-sensitive surface with a hydroxy compound of the benzene series already present 1n the light-sensitive layer by the action 20 of gaseous ammonia. i 9. The process of making photographic rints WhlCh consists in exposing to light Eehind a positive a su port coated with a salt of asulfonic acid 0 a 1.2-quinone' of the g5 naphthalene series, and developin the exwposed light-sensitive surface wit phenol already present in the light-sensitive layer bythe action of aseous ammonia.

In testimonyw ereof I afiixm s1 ature. MAX hficx. 

